Kris Commons is 'taking a risk' by holding out for a better contract at Celtic, according to boss Ronny Deila
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Celtic skipper Scott Brown did not return with the squad after Thursday night's 2-2 draw with Salzburg in Austria as he missed the returning plane to Glasgow due to a routine drugs test.
The Hoops midfielder scored his side's second goal in an enthralling Group D encounter and was picked for the obligatory drugs test after the game.
Celtic had to leave on a designated 2255 flight which meant the Scotland midfielder had to stay behind for the night.
Celtic expect him to return later on Friday ahead of Sunday's Premiership clash against Motherwell at Celtic Park.
Aberdeen have reported Celtic's Aleksandar Tonev for allegedly racially abusing Shay Logan during their Premiership clash at Parkhead on Saturday.
Press Association Sport understands the Dons defender immediately reported the alleged second-half incident to referee Bobby Madden and skipper Mark Reynolds before informing manager Derek McInnes.
Fourth official Crawford Allan and Celtic were also made aware of the allegation by the Dons management team.
The Scottish FA is awaiting the referee's report which should arrive on Monday.
Celtic were contacted by Press Association Sport but have yet to comment.
ohn Guidetti admits he cannot wait to sample the kind of European nights that made boyhood hero Henrik Larsson a Celtic icon.
– John Guidetti
It's really nice to be part of Celtic.
I was standing in a coffee house yesterday when I got the news and I was actually dancing because I was so happy. I really was buzzing.
Everybody knows what a great football club this is, especially in Sweden when Henrik Larsson was playing here. It's also a very well-known club because of the fans, who are so passionate and brilliant.
Even the people at City told me about the European nights. They said it's the best atmosphere in the world. People just don't say that for no reason and it must be true because I've heard it from so many places.
Adam Matthews has become the third player to pull out of Wales' squad through injury ahead of their opening Euro 2016 qualifier against Andorra.
The 22-year-old Celtic defender follows Reading winger Hal Robson-Kanu and West Ham's James Collins in withdrawing from Chris Coleman's squad for the away game on September 9.
A statement from the Football Association of Wales said Cardiff's Declan John had been called up from the Under-21s to replace Matthews. Newcastle's Paul Dummett and Reading's Jake Taylor have already received late calls.
Celtic have signed Stefan Scepovic 24 hours after the Serbia striker pulled the plug on a move to Parkhead.
The 24-year-old has signed a four-year contract with the Scottish champions despite leaving Celtic in the lurch going into the final day of the transfer window.
Celtic are also trying to complete the loan signing of Manchester City striker John Guidetti after letting forwards Teemu Pukki, Amido Balde and Holmbert Fridjonsson leave Parkhead on a temporary basis.
Celtic have completed the loan signing of Ghana winger Mubarak Wakaso.
The 24-year-old, who played in the World Cup, arrives on a one-year loan deal with Celtic having the option to buy the player from Russian side Rubin Kazan.
Celtic announced the former Espanyol and Villarreal player will go straight into their squad for Sunday's Scottish Premiership clash at Dundee.
Stefan Johansen admitted "we weren't good enough" after Celtic bowed out of the Champions League for a second time this season.
– Stefan Johansen
Everybody's disappointed. We weren't good enough.
We had a chance today but we couldn't take it. We need to be better as a team.
We didn't manage to play the game we wanted to play. They (Maribor) are a good team and it was a good performance by them.
Celtic team to play NK Maribor: Gordon, Ambrose, Lustig, van Dijk, Izaguirre, Kayal, Mulgrew, Johansen, McGregor, Stokes, Berget #UCL (MD)